[mirror_ubuntu-artful-kernel.git] / drivers / parisc / hppb.c

/*
** hppb.c:
**      HP-PB bus driver for the NOVA and K-Class systems.
**
**      (c) Copyright 2002 Ryan Bradetich
**      (c) Copyright 2002 Hewlett-Packard Company
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
*/

#include <linux/types.h>
#include <linux/init.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/dma-mapping.h>
#include <linux/ioport.h>

#include <asm/io.h>
#include <asm/hardware.h>
#include <asm/parisc-device.h>

struct hppb_card {
	unsigned long hpa;
	struct resource mmio_region;
	struct hppb_card *next;
};

static struct hppb_card hppb_card_head = {
	.hpa = 0,
	.next = NULL,
};

#define IO_IO_LOW  offsetof(struct bc_module, io_io_low)
#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)

/**
 * hppb_probe - Determine if the hppb driver should claim this device.
 * @dev: The device which has been found
 *
 * Determine if hppb driver should claim this chip (return 0) or not 
 * (return 1). If so, initialize the chip and tell other partners in crime 
 * they have work to do.
 */
static int hppb_probe(struct parisc_device *dev)
{
	int status;
	struct hppb_card *card = &hppb_card_head;

	while(card->next) {
		card = card->next;
	}

	if(card->hpa) {
		card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);
		if(!card->next) {
			printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");
			return 1;
		}
		card = card->next;
	}
	printk(KERN_INFO "Found GeckoBoa at 0x%llx\n",
			(unsigned long long) dev->hpa.start);

	card->hpa = dev->hpa.start;
	card->mmio_region.name = "HP-PB Bus";
	card->mmio_region.flags = IORESOURCE_MEM;

	card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
	card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;

	status = ccio_request_resource(dev, &card->mmio_region);
	if(status < 0) {
		printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
			__FILE__, &card->mmio_region);
	}

        return 0;
}

static struct parisc_device_id hppb_tbl[] = {
        { HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
        { HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
        { HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
        { HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
        { 0, }
};

static struct parisc_driver hppb_driver = {
        .name =         "gecko_boa",
        .id_table =     hppb_tbl,
	.probe =        hppb_probe,
};

/**
 * hppb_init - HP-PB bus initialization procedure.
 *
 * Register this driver.   
 */
void __init hppb_init(void)
{
        register_parisc_driver(&hppb_driver);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	** hppb.c:
	3	** HP-PB bus driver for the NOVA and K-Class systems.
	4	**
	5	** (c) Copyright 2002 Ryan Bradetich
	6	** (c) Copyright 2002 Hewlett-Packard Company
	7	**
	8	** This program is free software; you can redistribute it and/or modify
	9	** it under the terms of the GNU General Public License as published by
	10	** the Free Software Foundation; either version 2 of the License, or
	11	** (at your option) any later version.
	12	**
1da177e4 LT	13	*/
	14
	15	#include <linux/types.h>
	16	#include <linux/init.h>
	17	#include <linux/mm.h>
	18	#include <linux/slab.h>
bec85e80	19	#include <linux/dma-mapping.h>
1da177e4 LT	20	#include <linux/ioport.h>
	21
	22	#include <asm/io.h>
	23	#include <asm/hardware.h>
	24	#include <asm/parisc-device.h>
	25
1da177e4 LT	26	struct hppb_card {
	27	unsigned long hpa;
	28	struct resource mmio_region;
	29	struct hppb_card *next;
	30	};
	31
df8e5bc6	32	static struct hppb_card hppb_card_head = {
1da177e4 LT	33	.hpa = 0,
	34	.next = NULL,
	35	};
	36
	37	#define IO_IO_LOW offsetof(struct bc_module, io_io_low)
	38	#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)
	39
	40	/**
	41	* hppb_probe - Determine if the hppb driver should claim this device.
	42	* @dev: The device which has been found
	43	*
	44	* Determine if hppb driver should claim this chip (return 0) or not
	45	* (return 1). If so, initialize the chip and tell other partners in crime
	46	* they have work to do.
	47	*/
	48	static int hppb_probe(struct parisc_device *dev)
	49	{
	50	int status;
	51	struct hppb_card *card = &hppb_card_head;
	52
	53	while(card->next) {
	54	card = card->next;
	55	}
	56
	57	if(card->hpa) {
cb6fc18e	58	card->next = kzalloc(sizeof(struct hppb_card), GFP_KERNEL);
1da177e4 LT	59	if(!card->next) {
	60	printk(KERN_ERR "HP-PB: Unable to allocate memory.\n");
	61	return 1;
	62	}
1da177e4 LT	63	card = card->next;
1da177e4 LT	64	}
cae5a39f HD	65	printk(KERN_INFO "Found GeckoBoa at 0x%llx\n",
cae5a39f HD	66	(unsigned long long) dev->hpa.start);
1da177e4	67
53f01bba	68	card->hpa = dev->hpa.start;
1da177e4 LT	69	card->mmio_region.name = "HP-PB Bus";
	70	card->mmio_region.flags = IORESOURCE_MEM;
	71
53f01bba MW	72	card->mmio_region.start = gsc_readl(dev->hpa.start + IO_IO_LOW);
53f01bba MW	73	card->mmio_region.end = gsc_readl(dev->hpa.start + IO_IO_HIGH) - 1;
1da177e4 LT	74
	75	status = ccio_request_resource(dev, &card->mmio_region);
	76	if(status < 0) {
3fad9b8d JP	77	printk(KERN_ERR "%s: failed to claim HP-PB bus space (%pR)\n",
3fad9b8d JP	78	__FILE__, &card->mmio_region);
1da177e4 LT	79	}
	80
	81	return 0;
	82	}
	83
1da177e4	84	static struct parisc_device_id hppb_tbl[] = {
075b8783 RB	85	{ HPHW_BCPORT, HVERSION_REV_ANY_ID, 0x500, 0xc }, /* E25 and K */
	86	{ HPHW_BCPORT, 0x0, 0x501, 0xc }, /* E35 */
	87	{ HPHW_BCPORT, 0x0, 0x502, 0xc }, /* E45 */
	88	{ HPHW_BCPORT, 0x0, 0x503, 0xc }, /* E55 */
1da177e4 LT	89	{ 0, }
	90	};
	91
	92	static struct parisc_driver hppb_driver = {
bdad1f83	93	.name = "gecko_boa",
1da177e4 LT	94	.id_table = hppb_tbl,
	95	.probe = hppb_probe,
	96	};
	97
	98	/**
4f63ba17	99	* hppb_init - HP-PB bus initialization procedure.
1da177e4 LT	100	*
	101	* Register this driver.
	102	*/
	103	void __init hppb_init(void)
	104	{
	105	register_parisc_driver(&hppb_driver);
	106	}